Blood has a variety of components that take on different functions, among which the main one respons

Blood corpuscle. Blood cells, also known as "blood cells", are cells that exist in the blood and can travel throughout the body with the flow of blood. to mammals.

There are three main types of blood cells: red blood cells and white blood cells.

Platelet. Among them, red blood cells are vertebrates.

The body is the main medium for transporting oxygen through the blood, and it also has immune functions.

White blood cells: play a major role in immunity. When germs invade the body, white blood cells can pass through the capillary wall, concentrate on the site of invasion, surround the germs and engulf them. Platelets: play an important role in the process of hemostasis.

Erythrocyte. Composed of plasma and blood cells. Plasma contains various nutrients such as plasma proteins (albumin, globulin, fibrinogen), lipoproteins, inorganic salts, oxygen, hormones, enzymes, antibodies, and cell metabolites.

Blood cells include red blood cells, white blood cells, and platelets. Mammalian blood has a coagulation mechanism, and when platelets rupture, the plasma's water-soluble fibrin and blood cells are coagulated into blood cakes, and the remaining transparent liquid is called serum. The red blood cells are 7 in diameter, biconcave disc-shaped, **thinner, and the periphery is thicker, so it is lightly stained and the periphery is darker in the blood smear specimen (see color map).

Under the scanning electron microscope, the morphological characteristics of red blood cells can be clearly visualized. This morphology of erythrocytes gives it a large surface area (about 140 m2) and thus allows it to be maximally adapted to its function of carrying O2 and part of CO2. Fresh single red blood cells are yellowish-green, the blood is scarlet red because of the large number of red blood cells, and multiple red blood cells are often stacked together in a string of money.

Mature red blood cells have no nucleus and no organelles, and the cytoplasm is filled with hemoglobin (HB). Hemoglobin is an iron-containing protein that makes up about 33% of the weight of red blood cells. It has the function of binding and transporting O2 and CO2 Because hemoglobin has this property, red blood cells can supply O2 needed by tissues and cells throughout the body, and take away part of the CO2 produced.

In other words, it also carries carbon dioxide, but mainly oxygen. And depending on whether it is venous blood or arterial blood, arterial blood oxygen is more, venous blood oxygen is less, so the color looks darker redder. Hope it helps.

It is hemoglobin that is responsible for transporting oxygen in the blood, and it is characterized by the fact that where the oxygen concentration is high, the hemoglobin is easy to bind to oxygen, and where the oxygen concentration is low, the hemoglobin is easily separated from the oxygen.

The red blood cells in the blood are responsible for transporting oxygen.

Oxygen is only accounted for, and hemoglobin (Hb) in red blood cells is an effective tool for transporting oxygen.

Oxygen is mainly transported in the blood through oxyhemoglobin, because oxygen can combine with hemoglobin in red blood cells to form oxyhemoglobin, which transports oxygen to the tissues and organs that need it, and then the oxygen is separated from the hemoglobin for the use of tissues and organs. If the concentration of hemoglobin decreases and the body's ability to transport oxygen decreases, a range of symptoms of anemia occur.

Precautions for the transport of oxygen

Factors influencing oxygen transport include blood pH and partial pressure of carbon dioxide, temperature, intraerythrocyte 2,3-bisphosphoglyceric acid, carbon monoxide, and other factors.

A decrease in pH or an increase in the partial pressure of carbon dioxide decreases the affinity of Hb for oxygen molecules, and this effect is called the Bohr effect. When the temperature increases, the affinity of HB for oxygen molecules decreases, carbon monoxide can combine with HB to form carbon monoxide hemoglobin, which occupies the point where HB combines with oxygen molecules, affecting the transport of oxygen in the blood, and carbon monoxide hemoglobin is cherry colored, so people with carbon monoxide poisoning have severe hypoxia in the body, but no cyanosis.

a.Physical dissolution.

b.Oxyhemoglobin form.

c.Carbamate hemoglobin bucket hole tremor code form.

d.Oxygen gas in molecular form.

e.None of the above.

Correct answer: B

Answer]: C1) This question examines the knowledge points of physiology-blood-blood cell physiology. (2) Because hemoglobin is easy to combine with oxygen in places with high oxygen content and separated from oxygen in places with low oxygen content, oxygen in blood is transported in the form of oxyhemoglobin.

The main function of red blood cells is to transport oxygen and carbon dioxide fissure. Oxygen in the blood is in the form of oxyhemoglobin combined with hemoglobin to form oxyhemoglobin (C pair); Carbon dioxide in the blood is mainly physically dissolved in the form of bicarbonate and carbamoylhemoglobin (error A, error B, error D). Therefore, the answer to this question is c.

There are two forms of oxygen transport. First, it is directly soluble in plasma transport, but its amount is very small; The second is the transport of hemoglobin in red blood cells, which is the main form of oxygen transport.

Oxygen combines with ferric iron in hemoglobin to form oxyhemoglobin, which is affected by the partial pressure of oxygen. In places with high partial pressure of oxygen, such as in the lungs, oxyhemoglobin production increases; In the tissues of the hypogeno-depleted state of the hypogen, oxyhemoglobin releases oxygen; It is used by tissue cells, so its amount is gradually reduced.

In arterial blood, about 20 milliliters of oxygen are carried for every 100 milliliters of blood; In venous blood, only 15 milliliters of oxygen are contained for every 100 milliliters of blood, which means that about 5 milliliters of oxygen are released into the tissues for every 100 milliliters of arterial blood during circulation. All factors that affect the oxygen carried by hemoglobin can cause hypoxia.

The process by which hemoglobin combines with oxygen is a very magical process. First of all, an oxygen molecule binds to one of the four subunits of hemoglobin, and the globin structure changes after combining with oxygen, resulting in a change in the white structure of the entire hemoglobin egg ring.

This change makes it easier for the second oxygen molecule to bind to another subunit of hemoglobin than the first, and its binding further facilitates the binding of the third oxygen molecule, and so on until each of the four subunits that make up hemoglobin binds to each of the four oxygen molecules.

Red blood cells, plasma, platelets.

Test question analysis: blood is the carrier of material transportation in the human body, including plasma and blood cells, plasma is light yellow translucent, its main component is water, accounting for more than 90% of blood components, the rest of the protein, glucose, inorganic salts and other nutrients, in addition to metabolic waste, so the main role of plasma is to carry blood cells, transport nutrients and metabolic waste, blood cells include red blood cells, white blood cells and platelets, red blood cells are rich in hemoglobin, the main function is to transport oxygen, White blood cells are able to do deformant movements, cross the capillary wall and enter the tissue, engulf bacteria, and the main function of platelets is to stop bleeding and accelerate blood clotting.

Comments: This question is a basic question, the difficulty is average, and you can solve the problem if you are proficient in the components and main functions of blood.